Another innocent girl, Mitsumi is considered the middle
girl between Keitaro and Naru.

Mitsumi has a problem of always fainting for no particular
reason, outlined mainly in episodes 8-14. The significance of her fainting
prevents outrageous things from occurring, such as a kiss between Naru and
Keitaro. Of course, this coincidence is intentional to stir up the inherent
comedy.

**Spoiler**

Friends with all the
Hinata residents, she was from episode 21-25 considered the girl of Keitaro’s
dreams. Though the plot may suggest so, the romance between Keitaro and Naru
wouldn’t allow Mitsumi to be the girl in Keitaro’s dreams or else Keitaro
would have broken a promise and thus making the relationship between Keitaro and
Naru a little more passive.